maple_tree: fix 32 bit mas_next testing

[ Upstream commit 7a93c71a6714ca1a9c03d70432dac104b0cfb815 ]

The test setup of mas_next is dependent on node entry size to create a 2
level tree, but the tests did not account for this in the expected value
when shifting beyond the scope of the tree.

Fix this by setting up the test to succeed depending on the node entries
which is dependent on the 32/64 bit setup.

Link: https://lkml.kernel.org/r/20230712173916.168805-1-Liam.Howlett@oracle.com
Fixes: 120b116208a0 ("maple_tree: reorganize testing to restore module testing")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
  Closes: https://lore.kernel.org/linux-mm/CAMuHMdV4T53fOw7VPoBgPR7fP6RYqf=CBhD_y_vOg53zZX_DnA@mail.gmail.com/
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/lib/test_maple_tree.c b/lib/test_maple_tree.c
index 261bad680f81de9f06eedbedac9fbe0573bac81a..fad668042f3e7284643b0aff6b5367f5ca206b16 100644 (file)
--- a/lib/test_maple_tree.c
+++ b/lib/test_maple_tree.c
@@ -1863,13 +1863,16 @@ static noinline void __init next_prev_test(struct maple_tree *mt)
                                                   725};
        static const unsigned long level2_32[] = { 1747, 2000, 1750, 1755,
                                                   1760, 1765};
+       unsigned long last_index;
 
        if (MAPLE_32BIT) {
                nr_entries = 500;
                level2 = level2_32;
+               last_index = 0x138e;
        } else {
                nr_entries = 200;
                level2 = level2_64;
+               last_index = 0x7d6;
        }
 
        for (i = 0; i <= nr_entries; i++)
@@ -1976,7 +1979,7 @@ static noinline void __init next_prev_test(struct maple_tree *mt)
 
        val = mas_next(&mas, ULONG_MAX);
        MT_BUG_ON(mt, val != NULL);
-       MT_BUG_ON(mt, mas.index != ULONG_MAX);
+       MT_BUG_ON(mt, mas.index != last_index);
        MT_BUG_ON(mt, mas.last != ULONG_MAX);
 
        val = mas_prev(&mas, 0);